<template>
	<div>
	<!-- 面包屑头部 -->
	<el-breadcrumb separator-class="el-icon-arrow-right">
	  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
	  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
	  <el-breadcrumb-item>参数列表</el-breadcrumb-item>
	</el-breadcrumb>
	<!-- 卡片视图 -->
	、<el-card>
		<!-- 警告区域 -->
		 <el-alert
			:closable="false"
		    title="注意: 只允许为第三级分类设置相关参数!"
		    type="warning"
		    show-icon>
		  </el-alert>
		  <!-- 选择商品分类 -->
		  <el-row class="cat_opt">
			  <el-col>
				  <span>选择商品分类：</span>
				  <!-- 选择级连 -->
				    <el-cascader
					expand-trigger="hover"
				      v-model="selectedCateKeys"
				      :options="catelist"
					  :props="cateProps"
				      @change="handleChange"></el-cascader>				  
			  </el-col>
		  </el-row>
		  
		  <el-tabs v-model="activeName" @tab-click="handleTabClick">
		     <!-- 添加动态参数面板 -->
			  <el-tab-pane label="动态参数" name="many">
				  <el-button @click='addDialogVisible = true' :disabled='isBtnDisabled' type='primary' size='mini'>添加参数</el-button>
			 <!-- 动态参数表格 -->
			 <el-table :data="manyTableData" border stripe>
				<!-- 索引列 -->
				<el-table-column type="expand">
					<template slot-scope='scope'>
						<el-tag @close='handleClose(i,scope.row)' closable v-for="(item,i) in scope.row.attr_vals" :key='i'>{{item}}</el-tag>
					<!-- 输入文本框 -->
					<el-input
					  class="input-new-tag"
					  v-if="scope.row.inputVisible"
					  v-model="scope.row.inputValue"
					  ref="saveTagInput"
					  size="small"
					  @keyup.enter.native="handleInputConfirm(scope.row)"
					  @blur="handleInputConfirm(scope.row)"
					>
					</el-input>
					<!-- 添加按钮 -->
					<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
					</template>
				</el-table-column>
				 <el-table-column type="index"></el-table-column>
				 <el-table-column label="参数名称" prop="attr_name"></el-table-column>
				 <!-- 操作 -->
				 <el-table-column label="操作">
					 <template slot-scope="scope">
						 <el-button @click='showEditDialog(scope.row.attr_id)' type='primary' icon='el-icon-edit' size='mini'>编辑</el-button>
						 <el-button @click='removeParams(scope.row.attr_id)' type='danger' icon='el-icon-delete' size='mini'>删除</el-button>
					 </template>
				 </el-table-column>
			 </el-table>
			  </el-tab-pane>
			  
			  <!-- 添加静态属性面板 -->
		      <el-tab-pane label="静态属性" name="only">
				  <el-button @click='addDialogVisible = true' :disabled='isBtnDisabled' type='primary' size='mini'>添加属性</el-button>
			  <!-- 静态表格 -->
			  <el-table :data="oniyTableData" border stripe>
			  				<!-- 索引列 -->
			  				<el-table-column type="expand">
								<template slot-scope='scope'>
									<el-tag @close='handleClose(i,scope.row)' closable v-for="(item,i) in scope.row.attr_vals" :key='i'>{{item}}</el-tag>
								<!-- 输入文本框 -->
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
								</template>
							</el-table-column>
			  				 <el-table-column type="index"></el-table-column>
			  				 <el-table-column label="属性名称" prop="attr_name"></el-table-column>
			  				 <!-- 操作 -->
			  				 <el-table-column label="操作">
			  					 <template slot-scope="scope">
			  						 <el-button @click='showEditDialog(scope.row.attr_id)' type='primary' icon='el-icon-edit' size='mini'>编辑</el-button>
			  						 <el-button @click='removeParams(scope.row.attr_id)' type='danger' icon='el-icon-delete' size='mini'>删除</el-button>
			  					 </template>
			  				 </el-table-column>
			  </el-table>
			  </el-tab-pane>
		    </el-tabs>  
	</el-card>
	<!-- 添加参数对话框 -->
	<el-dialog
		@close="addDialogClosed"
	  :title="'添加' + titleText"
	  :visible.sync="addDialogVisible"
	  width="50%"
	  >
	 <!-- 内容主体区域 -->
	 <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
	   <el-form-item :label="titleText" prop="attr_name">
	     <el-input v-model="addForm.attr_name"></el-input>
	   </el-form-item>
	   </el-form>
	 <!-- 底部按钮 -->
	  <span slot="footer" class="dialog-footer">
	    <el-button @click="addDialogVisible = false">取 消</el-button>
	    <el-button type="primary" @click="addParams">确 定</el-button>
	  </span>
	</el-dialog>
	
	<!-- 修改参数对话框 -->
	<el-dialog
		@close="editDialogClosed"
	  :title="'修改' + titleText"
	  :visible.sync="editDialogVisible"
	  width="50%"
	  >
	 <!-- 内容主体区域 -->
	 <el-form :model="editForm" :rules="editFormRules" ref="addFormRef" label-width="100px">
	   <el-form-item :label="titleText" prop="attr_name">
	     <el-input v-model="editForm.attr_name"></el-input>
	   </el-form-item>
	   </el-form>
	 <!-- 底部按钮 -->
	  <span slot="footer" class="dialog-footer">
	    <el-button @click="editDialogVisible = false">取 消</el-button>
	    <el-button type="primary" @click="editParams">确 定</el-button>
	  </span>
	</el-dialog>
	</div>
</template>

<script>
	export default{
		data() {
			return{
				// 商品分类列表
			catelist:[],
				// 级联选自框配置对象
				cateProps:{
					value:'cat_id',
					label:'cat_name',
					children:'children'
				},
				// 级联选择双向绑定
				selectedCateKeys:[],
				// 标签页数据bang'din绑定
				activeName:'many',
				// 动态参数数据
				manyTableData:[],
				// 静态属性数据
				oniyTableData:[],
				// 添加对话框显示与隐藏
				addDialogVisible:false,
				// 添加参数表单数据对象
				addForm:{},
				// 添加表单验证规则
				addFormRules:{
				attr_name:[
				{ required: true, message: '请输入参数名称', trigger: 'blur' },
				]	
				},
				// 修改对话框显示与隐藏
				editDialogVisible:false,
				// 修改对话框表单对象
				editForm:{},
				// 修改对话框验证
				editFormRules:{
				attr_name:[
				{ required: true, message: '请输入参数名称', trigger: 'blur' },
				]	
				},
			}
		},
		created() {
		this.getCateList()
		},
		computed:{
			// 如果按钮需要被禁用，返回true,否则返回false
			isBtnDisabled(){
				if(this.selectedCateKeys.length !==3){
					return true
				}
				return false
			},
			//当前选中的三级分类
			cateId() {
				if(this.selectedCateKeys.length ==3){
					return this.selectedCateKeys[2]
				}
				return null
			},
			// 动态计算标题文本
			titleText(){
			if(this.activeName =='many'){
				return '动态参数'
			}
				return ' 静态属性'
			},
		},
		methods:{
			// 获取分类列表
			async getCateList(){
				const {data:res} = await this.$http.get('categories')
				// console.log(res)
				if(res.meta.status !== 200){
					return this.$message.error('获取商品信息失败')
				}
				this.catelist = res.data
				
			},
			// 级联选择选择变化监听
			 handleChange(){
				this.getParamsData()
			},
			// tab页标签点击事件
			handleTabClick(){		
				this.getParamsData()
			},
			// 获取参数的列表数据
			async getParamsData(){
			if(this.selectedCateKeys.length !==3){
				this.manyTableData = []
				this.oniyTableData = []
				this.selectedCateKeys = []
				return 
			}
			// 根据所选分类ID，和当前所处面板获取对应的参数
			const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel: this.activeName}})
			if(res.meta.status !==200){
				return this.$message.error('获取参数失败')
			}
			// console.log(res.data)
			res.data.forEach(item =>{
				item.attr_vals =item.attr_vals ? item.attr_vals.split(' ') :[]
				// 控制文本框的显示与隐藏
				item.inputVisible = false
				// 文本框输入的值
				item.inputValue = ''
			})
			// console.log(res)
				if(this.activeName ==='many'){
					this.manyTableData =res.data
				}else{
					this.oniyTableData = res.data
				}				
			},
			// 监听添加对话框的关闭事件
			addDialogClosed(){
				this.$refs.addFormRef.resetFields()
			},
			// 点击按钮添加参数
			 addParams(){
				this.$refs.addFormRef.validate(async valid =>{
				if(!valid){
					return this.$message.error('请输入正确的参数名称')
				}
				 const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{attr_name:this.addForm.attr_name,attr_sel:this.activeName})
				// console.log(res)
				if(res.meta.status !==201){
					return this.$message.error('添加参数失败')
				}
				this.$message.success('添加参数成功')
				this.getParamsData()
				this.addDialogVisible = false
				})
			},
			// 点击按钮展示修改对话框
			async showEditDialog(attr_id){
				const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}})
				if(res.meta.status !==200){
					return this.$message.error('获取信息失败')
				}
				this.editForm = res.data
				this.editDialogVisible = true
			},
			// 监听修改对话框关闭
			editDialogClosed(){
				this.$refs.addFormRef.resetFields()
			},
			// 修改对话框确定按钮
			editParams(){
				this.$refs.addFormRef.validate(async valid =>{
					if(!valid){
						return this.$message.error('请输入正确的参数名称')
					}
					const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name:this.editForm.attr_name,attr_sel:this.activeName})
					// console.log(res)
					if(res.meta.status !==200){
						return this.$message.error('修改参数失败！')
					}
					this.$Message.success('修改参数成功！')
					this.getParamsData()
					this.editDialogVisible = false
				})
			},
			// 根据ID删除对应参数
			async removeParams(attr_id){
			const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
			          confirmButtonText: '确定',
			          cancelButtonText: '取消',
			          type: 'warning'
			        }).catch(resd =>resd)
					
					if(confirmResult !=='confirm'){
						return this.$Message.info('已取消删除')
					}
					// 删除业务逻辑
					const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
					if(res.meta.status !==200){
					return this.$message.error('删除参数失败！')	
					}
					this.$message.success('删除成功！')
					this.getParamsData()
					},	
					//文本框失去焦点或enter建都会触发
					async handleInputConfirm(row){
						 if(row.inputValue.trim().length === 0){
							 row.inputValue = ''
							 row.inputVisible = false
							 return
						 }
						 //如果没有return，则证明输入的内容，需要做后续处理
						 row.attr_vals.push(row.inputValue.trim())
						 row.inputValue = ''
						 row.inputVisible = false
						 // 发起添加请求
					this.saveAttrvrVals(row)
					 },
					 // 将对attr_vals的操作保存到数据库
					async saveAttrvrVals(row){
					const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{attr_name:row.attr_name,attr_sel:row.attr_sel,attr_vals:row.attr_vals.join(' ')})
					// console.log(res)
					if(res.meta.status !==200){
						return this.$message.error('修改参数失败')
					}
					this.$Message.success('修改参数成功')	 
					 },
					 // 点击按钮展示文本输入框
					 showInput(row){
						 row.inputVisible = true
						 // 让文本框获取焦点
						 // $nextTick 方法作用，当页面元素被重新渲染之后才会指定回掉函数方法
						  this.$nextTick(_ => {
						  this.$refs.saveTagInput.$refs.input.focus();
						});
					 },
					 // 删除对应参数可选项
					 handleClose(i,row){
						row.attr_vals.splice(i,1) 
						this.saveAttrvrVals(row)
					 },
						
		
	}
	}
</script>

<style lang="less" scoped="scoped">
	.cat_opt{
		margin: 15px 0;
	}
	.el-tag{
		margin: 10px;
	}
	.input-new-tag{
		width: 120px;
	}
</style>
